SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2022, Vol. 44 ›› Issue (4): 94-104.DOI: 10.1016/j.cjche.2022.01.001

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Inhibition of hematite on acid mine drainage caused by chalcopyrite biodissolution

Baojun Yang1,2, Wen Luo3, Maoxin Hong1,2, Jun Wang1,2, Xueduan Liu1,2, Min Gan1,2, Guanzhou Qiu1,2   

  1. 1 School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China;
    2 Key Laboratory of Biohydrometallurgy, Ministry of Education, Central South University, Changsha 410083, China;
    3 Department of Dermatology, The First Hospital of Changsha, Changsha 410005, China
  • Received:2021-06-30 Revised:2021-12-29 Online:2022-06-18 Published:2022-04-28
  • Contact: Jun Wang,E-mail:wjwq2000@126.com
  • Supported by:
    This work was supported by the Natural Science Foundation of Hunan Province (No. 2018JJ1041) and National Natural Science Foundation of China (Nos. 51774332, U1932129, 51804350 and 51934009).

Inhibition of hematite on acid mine drainage caused by chalcopyrite biodissolution

Baojun Yang1,2, Wen Luo3, Maoxin Hong1,2, Jun Wang1,2, Xueduan Liu1,2, Min Gan1,2, Guanzhou Qiu1,2   

  1. 1 School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China;
    2 Key Laboratory of Biohydrometallurgy, Ministry of Education, Central South University, Changsha 410083, China;
    3 Department of Dermatology, The First Hospital of Changsha, Changsha 410005, China
  • 通讯作者: Jun Wang,E-mail:wjwq2000@126.com
  • 基金资助:
    This work was supported by the Natural Science Foundation of Hunan Province (No. 2018JJ1041) and National Natural Science Foundation of China (Nos. 51774332, U1932129, 51804350 and 51934009).

Abstract: Even though biodissolution of chalcopyrite is considered to be one of the key contributors in the formation of acid mine drainage (AMD), there are few studies to control AMD by inhibiting chalcopyrite biodissolution. Therefore, a novel method of using hematite to inhibit chalcopyrite biodissolution was proposed and verified. The results indicated that chalcopyrite biodissolution could be significantly inhibited by hematite, which consequently decreased the formation of AMD. In the presence of hematite, the final biodissolution rate of chalcopyrite decreased from 57.9% to 44.4% at 20 day. This in turn suggested that the formation of AMD was effectively suppressed under such condition. According to the biodissolution results, mineral composition and morphology analyses, and electrochemical analysis, it was shown that hematite promoted the formation and accumulation of passivation substances (jarosite and Cu2-xS) on chalcopyrite surface, thus inhibiting the biodissolution of chalcopyrite and limiting the formation of AMD.

Key words: Chalcopyrite, Hematite, Biodissolution, Acid mine drainage, Acidithiobacillus ferrooxidans

摘要: Even though biodissolution of chalcopyrite is considered to be one of the key contributors in the formation of acid mine drainage (AMD), there are few studies to control AMD by inhibiting chalcopyrite biodissolution. Therefore, a novel method of using hematite to inhibit chalcopyrite biodissolution was proposed and verified. The results indicated that chalcopyrite biodissolution could be significantly inhibited by hematite, which consequently decreased the formation of AMD. In the presence of hematite, the final biodissolution rate of chalcopyrite decreased from 57.9% to 44.4% at 20 day. This in turn suggested that the formation of AMD was effectively suppressed under such condition. According to the biodissolution results, mineral composition and morphology analyses, and electrochemical analysis, it was shown that hematite promoted the formation and accumulation of passivation substances (jarosite and Cu2-xS) on chalcopyrite surface, thus inhibiting the biodissolution of chalcopyrite and limiting the formation of AMD.

关键词: Chalcopyrite, Hematite, Biodissolution, Acid mine drainage, Acidithiobacillus ferrooxidans